Cardboard folding box construction



Jan. 15, 1957 s. coNEscu 2,777,628

CARDBOARD FOLDING BOX CONSTRUCTION Filed Nov. 2, 1954 INVENTQR 1576 17619 onescu ATTORNEY United States Patent CARDBOARD FOLDING BOX CONSTRUCTION Sidney Conescu, Neponsit, N. Y.

Application November 2, 1954, Serial No. 466,345

2 Claims. (Cl. 229-31) This invention relates to a cardboard folding box construction and is an improvement on my United States Letters Patent No. 2,414,854.

I have found, after actual use during the time that boxes made under my aforesaid patent have been in commercial use, that in numerous instances (a) the boxes broke irregularly at and adjacent the gluing area; (b) that the glue tended to tear away and once it began to tear, it continued; (0) that the setting up of the boxes was too slow, and (d) certain difiiculties were encountered at the extreme opposed ends in the setting up process.

It, therefore, became necessary to provide a folding box to correct such defects which was accomplished by (1) scoring the box end angularly adjacent the S-shaped incisions so that the box broke exactly at the same place every time, (2) by enlarging the gluing area, bringing it to the scoring line to control the bending and to increase the strength of the glued parts of the box, (3) by cutting the ends angularly of the portion folded over, and (4) by shortening the length of the opposed end of the portion to be folded over to avoid difl'iculties in the setting up process, respectively, as stated in the preceding paragraph.

For a fuller understanding of the nature and objects of the invention, reference is had to the following detailed description, in connection with the accompanying drawings, in which:

Fig. l is a plan View of a blank for my improved folding paper box tray member;

Fig. 2 is a plan View showing the blank with the panels in folded condition lying flat;

Fig. 3 is a fragmentary section taken on the line 33 of Fig. 2;

Fig. is a fragmentary section taken on the line 44 of Fig. 2;

Fig. 5 is a fragmentary section taken on the line 55 of Fig. 2; and

Fig. 6 is a perspective View of the tray member of my folding box, in the flat condition.

Referring to the drawings, 10 is a blank from which the body member 11 is formed. Crease lines 12, 12 and 13, 13 outline side panels 14, 14 and the end panels 15, 15, leaving corner webs 16 outlined by the diagonal crease line 17 and the semi-circular extension 26, to define web segments 18 and 19. The segment 19 is arcuately shaped at 20 and semi-circular slit at 27, leaving the remnant of polygonal outline unaltered, for purposes which will appear more clearly hereinafter. From the end panels 15, there are extended flaps 21, 21 defined by the crease line 22. With this construction I form generally S-shaped incisions 23, whose axial line is angularly directed to diverge toward the crease line 22, and on a line from the edge of the flap along crease line 28 which ex tends angularly from the inner end of the S-shaped incision 23 to intersect the crease line 22 a short distance from the corner or end of the extending flaps 21. The ex- 2,777,628 Patented Jan. 15, 1957 ice tending flaps 21 have their opposed edges angularly cut, as shown at 29 so that the extreme opposed ends 30 are shorter than the width of the central portion for the purpose as will be hereinafter described.

The blank 10 thus provided may be fed through a folding machine, during which operation applicators apply a film of adhesive 24 to the web segments 18, and remnant above described, and then the blank is fed through a folding contrivance to hinge the panels 14, 14 about the crease lines 13, 13 to bring the adhesive 24 in contact with the panels 15, 15.

At this stage, the blank is run at right angles through a folding contrivance, and as an incident thereof an applicator applies an adhesive film 25 to practically the entire central portion of the flap 21 between the incisions 23 and between crease line 22 and crease line 28 and just short of the web segments 18 when folded inwardly, as shown in Fig. 2. Thereupon, the flaps 21 are folded about the crease line 22, to bring the flap 21 over the panels 15, and connect the flap 21 at its medial portion and between the S-shaped incisions 23, part of the crease line 28 and the crease line 22 by engagement of the adhesive film 25 with the body of the panel 15. While glue is preferred, other fastening means may be employed.

It should be noted that the area of adhesive film 25 in this application extends to the crease line 28 and is a larger area than that shown on the box of my Patent No. 2,414,854 so that there is a definite break at the crease line 23 on every box, thus definitely controlling the bending and also increasing the strength of the glued parts of the box at this portion. The incisions 23 serve the same purpose as set forth in my previous aforesaid patent.

When films 24 and 25 have dried, the tray-like segment may be set up by lifting up the edges of the panels 14 while simultaneously lifting the angularly cut edges 29 and folding the ends 30 of the flaps 21 inwardly over the corner web 19. The semi-circular slit 27 facilitates the breaking of the crease line 17 while the extension 26 increases the strength of the glued parts at this point.

Since the extreme ends 30 are shorter than the extreme ends of the flaps of the box of my Patent No. 2,414,854, it is possible to set up the box more rapidly and with less diificulty than the box of my previous patent. There is ample frictional action to temporarily wedge the free ends of the flap 21 in a deflected condition to facilitate directing the free edges over the corner Web 19. The arcuate edges 20 combine to direct the flap 21 into looking engagement over the segment 19 to bring the segment 19 into engagement with the segment 18.

The hinge cuts or incisions 23 and crease lines 28 of divergent character, minimizes the spreading of the flap ends 39 thereby also minimizing the stress on the medially connected portion of the flap 21. This enables me successfully to use glue for connecting the flap 21 to the panel 15.

The reason for the employment of the hinging cuts in the form of S-shaped incisions and their location and the stresses incident to the various parts is fully set forth in my previous aforesaid patent as Well as certain definitions and other advantages which need not be herein reiterated.

Having thus described my invention, what I claim to be new and desire to secure by Letters Patent is:

l. in a folding box having hinged side and end panels which are edgewise connected to each other by a diagonally folding Web arranged to lie in the set up condition of the box against one of the panels, said last mentioned panel having a locking flap defined by a fold, the combination wherein said flap is provided with diagonally inwardly directed S-shaped hinging cuts and diagonal crease lines extending from a point located a short distance inwardly from the extreme end of said flap and intersecting s ifi fold z'ind extending to rtheiouter eficf of "said S-sha'ped" irictionaI-ly contacts the sgid panel to hold the bent flap bra e n h ap i p ed t n 1 th x- -2. The box in accordance with claim 1 wherein the O ter edge o s ock n p e di er e e y from the medial portion and the extrem ends of a lockingfiap are shorter than its width. References Cited in the file of this patent UNITED STATES PATENTS 906,310 Scruby Dec. 8, 1908 1,040,984 Reber Oct. 8, 1912 1,736,720 Meyers Nov. 19, 1929 2,227,383 Snyder Dec. 31, 1940 2,233,874 Rosenthal Mar. 4, 1941 2,414,854 Conescu Jan. 28, 1947 

